Variable speed transmission



JuneQ, 1931. A. A. HEINZELMANN 1,809,123

VARIABLE SPEED TRANSMISSION Original Filed July 19, 1929 5 Sheets-Sheet l INVE TPR 41. am

1 1Z ATTORNEY I June A. A. HElN zELMANNv 1,809,123

VARIABLE SPEED TRANSMISSION Original Filed July 19, 1929 5 sheets-shet 2 31 h ldNjliyTR 4 Y i g ATTORNEY June 9, 1931. A.'A. HEINZELMANN 1,809,123

VARIABLE SPEED TRANSMISSION Original Filed July 19. 1929 Q {sheets-Sheet 5' I I, Z Iv 32 29 7 37 I INV NIOR ATTORNEY June 9, 1931. '-A. A. HEINZELMANN v VARIABLE SPEED TRANSMISSION Original Filed'July 19) 1929 5 Sheets-Sheet 4 INVE TOR ATTORNEY June 9, 1931.

A. A. HEINZELMANN VARIABLE SPEED TRANSMISSION Originl Filed July 19. 192 5 s heats-Sheet 5 ATTORNEY Patented June 9,1931

UNITED STATES PATENT orrica ALPHONSE A. HEINZELMANN, OF NEW YORK, 'N. Y., ASSIGNOR TO BLUDALK, 11 50., NEW YORK, N. Y., A CORPORATION OF NEW YORK SPEED TRANSMISSION Application filed July 19, 1929, Serial No. 379,425. Renewed May 2, 1931.

My invention relates to transmissions and refers particularly to variablespeed transmlSSlOnS. i

One of the objects of my invention is a device in which the rotatable speed of a driven member may be governed and controlled by the rotatable speed of the driving member without the interposition or necessity of change-speed or gear-shift mechanism.

transmissions are generally recognized and while numerous attempts have been made to most important element of automobile ma chine construction.

Although the present employed automobile transmissions involving gear-shifts have considerable value for the transmission of variable power, the possess many disadvantages, particularly ecause their application is generally controlled. by those unfamiliar with their operation, consequently, frequently resulting in serious injury to themechanism, and a" special disadvantage of such gear-shift transmissions is that a measurable period of time is required in order to shift from one gear to another, during which period the desired change of speed of theautomobile is not accomplished; and as a rapid change of speed is frequently iinperativein automobiles, such gear-shift transmissions are dangerous to safet It is evident, there ore,that a transmission, free from gear-shifts and having a constantly changing speed of the driven member dependent only upon the speed of the'engine, would havehigh eflicient and safety values overthe gear-shift type of mechanism.

The device of my invention overcomes the above-mentioned and man other objectionablefeatures of the gear-s ift transmissions and presents a transmission in which the The many disadvantages of gear-shift.

overcoming the dangers an cident to transmissions involving the use of The transmission of my invention com-- prises a device in which the revolution of the driving member produces a centrifugal force upon the driven member causing the latter. to p revolveand in which the centrifugal force increases with the increased speed of revolution of the driving member.

Further, it will be evident upon a consideration of my device, that as the increasing speed of the driving member increases the centrifugal force, the power of the driven member will increase.

I thus present a transmission, free from gear-shifts, and in which the power and speed of the driven member are controlled by the speed of the driving member, thus difficulties ingear-shifts.

Another .feature of my invention isauto-j matic means whereby the indirect drive between the driving member and the driven member, through the medium of their connection by means of the centrifugal members .of my device, may be converted into a direct drive between the driving member and the.

driven member when the revolution of the driven member has reached a predetermined speed.

.By means of this feature of my device, the driven member is revolved by means of the centrii-agal members carried by the driving member until a predetermined speed is attained, at which time the driven member is automatically and gradually locked to the driving member, thus causing a direct drive of the driven. member, when-the speed of revolution of the driving member is reduced to thepredetermined point, the element locking .the driving member to the driven mom-'- ber is gradually and automatically released, the centrifugal members then acting to produce an indirect drive.

The value of this change of drive is evifrom the stationary condition to a predetermined speed ofrevolution.

In my device changes of stationary condition to the predetermined speed of revolution are accomplished without the necessity of gear-shifts and when the predeterminedv speed of revolution is reached my device has all of the advantages of a fixed direct drive. v The advantages of a direct drive over an indirect centrifugal drive at high speeds for heavy loads is evident and the device of my invention possesses this valuable attribute connected with its valuable feature of the elimination of gear-shifts at all speeds.

The above mentioned and other valuable properties of my device will be evident upon a consideration of my specification and its accompanying drawings. In the accompanying drawings illustrating -one form of my device similar parts are designated by similar numerals.

Figure 1 is a vertical section of one form of my device through the line 1-1 of Figure'2.

Figure 2 is a section through the line 2-2 of F1gure 1. Fi re 3 is a section through the line 3-3 of Flgure 1. v 4 Figure 4 is a view along the line 4--4 of Fi ure 1.

igure 5 is a perspective view of one of the braces.

Figure 6 is a bottom view of Figure 1. Figure 7 is a perspective view'of one of the centrifugal members.

Figure 8 is a lan view of the cam runways and the centri ugaldrive-rollers.

The particular form of the device of my invention illustrated in the accompanying drawings, comprises a revoluble drive shaft 10, to which a spider 11 having a plurality of legs 12, 12 is fixedly attached, five legs being shown in the particularly described v form of my device.

Revoluble upon the drive shaft 10 is a driven casing comprising the sides 13 and 14, which are fixed to each other in spaced position by means of the connecting braces 15 15.

' These connecting braces-consider of two members 16 and 17, spaced and connected together by the element 18. The brace member 16 has the recesses 19 and 20 and the brace 5 member 17 has the recesses 21 and 22.

The driven casing is revoluble upon the ball bearings 23, 23. 7

Fixedly attached to the side 13 of the driven casing is. a sleeve 24 fixedly attached to the driven shaft 25.

Fixedly attached to the drive-shaft 10 is a direct drive disk 26, the operation. of which .will be described later. Within the inner face'of the driven casing side 13 is a cam runway 27 and within the speed from the 12, 12. This revolution of centrifu' al members, which being revoluthe cam runways the rollers agamst the sides of the runways inner face of the driven casing side 14 is a cam runway 28, the longitudinal axes of the two runways being at right angles to each other.

Extending through and be 0nd an annular opening in each leg 12 o the spider 11 is a cylindrical pin 29.

Pivotally carried by each pin 29 is a centrifugal member comprising the link 30, one end of which has the opening 31, into which the pin 29 enters, and the surrounding boss 32. The other end portion of the link 30 has an openin surrounded by a boss 33 within which is t e revoluble pin 34. Fixedly attached to the pin 34is an annular member 35 to which is attached the member 37, the

latter being for the purpose of greater centrifugal throw during the operation of the device. Pivotally attached to the outer face of the annular member 35 are two drive rollers 36, 36, which rollers move within the cam runway 27 and are capable of abutment upon the sides thereof.

As each side of the pivot 29 carries a centrifugal member and as there are five such pins, the illustrated device contains ten centrifu al members, the rollers of five being mova le within the cam runway 27 and the opposite five being movable within the cam runway 28. The elements of the other centrifugal members are shown by prime inumerals. H I Fixedly attached to the drive shaft 10 is the annular. plate 26 having an angular recess 38 in its outer periphery.

Pivotally attached to each brace by means I of a pin 39 passing through the holes 40, 40

of said brace is an arm'41. A wedge-shaped locking-member, or slide, 42, is pivotally attached to each arm 41 by means of the pivot 43, .the locking-member 42 being capable of abutment against the sides of the angular recess 38 of the plate 26. The other end of the arm 41 carries a removable weight 44. A

' spring 45, carried by the pin 46 passing through opening 47 of the brace, abuts upon the screw 48, threaded through an: opening in the brace, and the pin 49, carried by the arm 41.

The operation of the device is as follows The revolution of the drive shaft 10 revolves the spider 11 and the plurality of legs carries the plurality bly pivote to the legs and each having a pair ofpivotally attached revoluble rollers 36, 36,,causes the said rollersto move within 27 and 28, the abutment of causing a revolution of the casings 13 and 14 and a revolution of the driven shaft 25.

The following is the method by which the ive.

the casing is such that the momentum'will noticause the weights'44, 44, to move outwardly, the shoes 42, 42 will not be in abutment with the sides of the recesses 38, 38 of the members 26, and hence the revolution of thedrive shaft 10 will be transmitted to a When, however, the centrifugal momentum is sufiicient, the weights 44, 44 will be thrown gradually outwardly, thus causing the arms 41, 41 to move upon the pins 39, 39 and forcing the shoes, or locking members 42, 42 into the recess 38-of the member 26.

The drive shaft 10 is thus locked, or fixedly attached, to the casing by means of the member 26 fixedly attached to the shaft 10 and hence the driven shaft 25 is directly driven by the'drive shaft 10. Y

The amount of momentum of the casing necessary to cause a direct drive action may be governed by the weight of the weight 44 and the movement of the screw 48 against the spring 45. r

It will thus be seen that the driven shaft 25 will be revolved indirectly .through the medium of the centrifugal members until a predetermined speed is obtained, a, further increase of speed gradually converting the indirect drive into a direct drive through the medium of the 'member 26 and the arms 41 41.

It will be noted that the line of direction of the centrifugal force is not at right angles to the axial-line of the drive shaft but is always directed forwardly of the arc of revolution, thus transmitting forwardly centrifugal force to the driven member.

Further, the constantly changing line of direction of centrifugal force with respect to the axial line of the drive shaft overcomes the objection to a fixed line of direction of centrifu al force with respect to the axial line of t e drive shaft, in which latter case there are positions dui-in the revolution when the line of direction 0 centrifugal force is opposed to driving the driven member, as

for instance at'the top and bottom portions of the cam-wa Further while the legs .12, 12 of the spider l1 revolve in a circular movement around the drive shaft 10, the relative positions of the rollers 36, 36 thereto are constantly changing, and as these two rollers 36, 36 are in fixed positionwith respect to each other upon the member 35, and as the line of direction of centrifugal force of these two rollers do not coincide, their lines of centrifugal forces are.

not identical. Because of the above conditions, the resultant of the lines of force of the two rollers varies inwardly and outwardly against the respective inner and outerwalls o the cam-runway, causing a constant forwardly directed centrifugal force upon either ohangeably.

shaft, a spider having a pluralit the inner or the'outer wall, or both, thus producing' a constant revolving force upon the to employ an oddnumber in order that no two centrifugal-members in anyone series will at'any time have the same angular position with res ect to the direction of revolution of the drlven member.

While I prefer to employ two offset centrifugal rollers, as shown, any suitable numentirely dispensed with. In my s ecification and drawings, I refer to the centri ugal-member carrying member as the drive member and the cam runway member as the driven member, but it. is'evident that these terms may be reversed if the cam runway member is used as the drive member, and hence, in my specification and claims I use the terms inter- I donot limit myself to the particular size, shape, number or arrangement of parts as shown and described, as these are given ber ofsuch rollers may be used or they may be simply as a means for clearly describing my invention.

What I claim is:

1. In a variable speed transmission, in'com bination, a revoluble driven member havin a cam runwa a revoluble drive shaft, a spi er having a p urality of legs fixedly attached to said shaft, a link pivotally attached to the end portion of each said leg, a roller-carryin member pivotally attached to the free en of'each said link and a plurality of rollers pivotally attached to each said roller-carrying member ositioned within said runway and capable o? abutment upon the sides thereof whereby the revolution of said shaft will revolve said driven member.

2. In a variable speed transmission, in combination, a revoluble driven member having a non-circular cam runway, a revoluble drive of legs fixedly attached to said shaft, a lin pivotally attached to the end portion of each said leg, a roller-carrying member pivotally attached 1 to the free end of each said link and a pluralroller-"carrying member positioned within s'aid runway and capable of abutment upon a the sides thereof whereby the revolution of said shaft will revolve said driven member.

3. In a variable speed transmission, incombination, a revoluble driven member havin a havin free en of rollers pivotally attached to each said rollcam runway, a revoluble drive shaft, a spi er a plurality of legs fixedly attached to sai shaft, a link pivotally attached to the end portion of each leg, a non-slidable rollercarryin member pivotally'attached to the of each said link, and a plurality attached'to the end portion of each said leg,

a non-slidable roller-carrying member i'votally attached to the free end of each sai link, and a plurality of rollers pivotally attached to each said roller-carrying member positioned within said runway and capable of abutment upon the sides thereof whereby the revolution of said shaft will revolve said" driven member.

5. In a variable speed transmission, in combination, a revoluble driven member having a cam runway having parallel corresponding side walls, a revoluble drive shaft,

. a spider having a plurality of legs fixedly attached to said shaft, ahnk pivotally attached to the end portion of each said leg, a roller-carrying member pivotally attached to the free end of each said link and a plurality of rollers pivotally attached to each said roller-carrying member positioned within said runway and capable of abutment upon the sides thereof whereby the revolution of saidshaft will revolve said driven member.

6. In a variable speed transmission, in combination, a revoluble driven member having a cam runway having parallel corresponding side walls, a revoluble drive shaft, a spider having aplurality of legs fixedly ivotally attached tothe end portion of eac said leg, a

' non-slidable' roller-carrying member pivotal ly attached to the free-end ofeach said link,

and a lurality of rollers pivotally attached to eac said] roller-carrying'member -posi- U tioned within said runway and capable of abutment upon the sides thereof whereby the tached to the revolution of said shaft will revolve said driven member.

. 7. In a variable combination, a revoluble driven member having two ends, each end having a cam runway in its'inner face; a revoluble drive shaft; a spider having a plurality of legs fixedly attached to said shaft; two links pivotally atend portion of each said le a member pivotally attache to roller-carryin each said link and a plurality the free end 0 of rollers pivotally attached to each said speed transmission, in

roller carrying member, one series of said rollers being positioned within said runway and capable of abutment u n the sides thereof and the other series 0 said rollers bein positioned within the other said runway an capable of abutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven member. I

8. In a variable speed transmission, in combination, a revoluble driven member havin two ends, each end having a cam runway in its inner face; a revoluble drive shaft positioned between said driven member ends, a spider having a plurality of legs positioned between said driven member ends and fixedly attached to said'shaft; two links pivotally attached to the end portion of each said leg; a roller-carrying member ivotally attached to the free end of each sa d link and a plurality of rollers pivotally attached to each said roller carrying member, one series of said rollers being positioned within said runway and capable of "abutment upon the sides thereof and the other seriesflo'f said rollers being positioned witihn the other'said runway and capable of abutmtnt upon the sides thereof, so positioned that the revolution of said drive. shaft will revolve said driven member. I 3 1 9. In a v friable speed transmission, in combination, a-'revoluble driven member having two ends, each end having a cam runway having parallel corresp hidin side walls in its inner face a revolub e drive shaft; a spider having a plurality of legs fixedly attached to said shaft; two links pivotally attached to the end portion of each said le a roller-carrying member pivotally attached-to the free end of each said link and a plurality of rollers pivotally attached to each other said roller carrying member, one series of said rollers bein positioned within said runway and capa 1e of abutment upon the sides thereof and the other series of said rollers being positioned within the other said runway an capable of abutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven member.

10. In a variable speed'transmission, in combination, a revolubledriven member having two ends each end having a cam runway having parallel correspondin side walls in its inner face; a revoluble drive shaft, psosi- 1 tioned within the other said runway and capable of abutment upon the sides thereof,

- so positioned that the revolution of said drive shaft will revolve said driven member.

11. In a variable speed transmission, in combination, a revoluble driven member having a cam runway, a revoluble drive shaft, a

spider havin a pluralit of legs fixedly attached to sai shaft, a lin pivotally attached to the end portion of each said leg, a rollercarrying member pivotally attached to the free end of'each said link, a plurality of rollg'mcally lock said driven member to said shaft.

12. In a variable speed transmission, in combination, a revoluble driven member having a cam runway having parallel corresponding side walls, a revoluble drive shaft, a spider having a plurality of legs fixedly attached to said shaft, a link pivotally attached to the end portion of each said leg, a roller-carrying member pivotally attached to the free end of each said link, a plurality of rollers pivotally attached to each said roller-carrying member positioned within said runway and capable of abutment upon the sides thereof whereby the revolution of said shaft will revolve said driven-member and means whereby the revolution of said driven member at a predetermined, speed will automatically lock said driven member to said shaft.

.13. In a variable speed transmission, in combination, a revoluble driven member having two ends, each end having a cam runway in its inner face; a revoluble drive shaft; a

spider havin a plurality of legs fixedlyattached to sai shaft; two links ivotally attached to the end portion of eac said leg; a;

roller-carrying member pivotally attached to the free end of each said link; a plurality of rollers pivotally attached to each said roller carrying member, one series of said rollers bein positioned within said runwa and capa 1e of abutment upon the sidest ereof and the other series of said rollers bein positioned within the other said rimway an capable of abutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven member and means whereby the revolution of said driven ing two ends, each end having a cam runway havin parallel corresponding side walls in its inner ace; a revoluble drive shaft;,a spider having a plurality of legs fixedly attached to said shaft; two links pivotally attached to the end pgortion of each saidleg; a roller-carrying mem er pivotally attached to the free end of each said link; a plurality .of rollers pivotally attached to each said roller carrying member, one series of said rollers bein positioned Within said runway and capable of abutment upon the sides thereof and the other series of said roller being positioned within the other said runway and capable of abutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven member and means whereby the 15. In a variable speed transmission, in

combination, a revoluble driven member having two ends, each" end'having a cam runway in its inner face; a revoluble drive shaft positioned between said driven member ends; a spider having a plurality of legs positioned between said driven member ends and fixedly attached to said shaft; two links pivotally attached to the end portion of eachsaid leg; a roller-carrying member ivotally attached to the free-end of each said link; a plurality of rollers pivotally attached to each said roller carrying member, one series of said rollers being positioned Within said runway and capable of abutment u on the sides thereof and the other series 0 said rollers being positioned within the other said runway and capable of abutment upon the sides thereof, so positioned that the revolution' of said drive shaft will revolve said driven member and means whereby the revolution ofsaid driven member at a predetermined speed will automatically lock said driven member. to said shaft.

16. In a variable speed transmission, in combination, a revoluble driven member having two ends, each end having a cam runway having parallel corresponding side walls initsiiner face; a revoluble drive shaft positioned b etween said driven member ends; a spider'having a plurality of le s positioned between said driven member en s and fixedly attached to said shaft; two links pivotally attached to the end portion of each said leg; 0. roller-carrying member ivotally attached to the free end of each said link; a'plurality of rollers pivotally attached to each said roller-carrying member, one series of said rollers being positioned within said runway and ca able of abutment upon the sides thereof an the other series of said rollers being positioned within the other said runway and capable ofabutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven member and means whereby the revolution of said driven member eta predetermined speed will autonlilatfipally lock said driven member to said s a 7 17. In a variable speed transmission, in-

- rollers pivotally attached to each said rollercarrying member positioned within said runway and capable of abutment upon the sides thereof whereby the revolution of said shaft will revolve said driven member, an annular locking member fixedly attached to said shaft; a centrifugally movable member carried by said driven member, and means-whereby the rotary movement of said driven member will cause said centrifugally movable member to I engage with, and disengage from, said-annular member causing the driven member to be locked to, and unlocked from, said shaft.

18. In a variable speed transmission, in

combination, a revoluble driven member having a cam runway, having parallel corresponding side walls, a revoluble drive shaft, a spider having a plurality of legs fixedly attached to said shaft, a link pivotally attached to the end portion of each said leg, a roller-carrying member (pivotally attached to the free .end of each sai link, a plurality of rollers pivotally attached to each said rollercarrying member positioned within said runway and capable of abutment upon the sides thereof whereby the revolution of said shaft will revolve. said driven member, an annular locking member fixedly attached to said shaft; a centrifugally movable' member carried by said driven member, and means whereby the rotary movement of said driven member will cause said centrifugally movable member to engage'with, and disengage from, said annular member causing the driven member to be locked to, unlocked from, said shaft.

19. In a variable speed transmission, in combination, a revoluble driven member having two ends each end having a cam runway in its inner ace; a revoluble drive shaft; a spider having a plurality of legs fixedly attached to said shaftytwo links pivotally attached to the end portion of each said leg; a roller carrying member ivotally attached to the free end of each said link; a plurality and a of rollers pivotally attached to each said roller carrying member, oneseries' of said.

rollers being ositioned within said runway and ca able 0 abutment u on the sides thereof an the other series 0 said rollers being positioned within the other said runway an capable of abutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven member, an annular locking member fixedly attached to said shaft a centrifu ally movable member carried by said driven member, and means .neoarae whereby the rotary movement of said driven member will cause said centrifully movable member to engage with, and disengage from said annular member causing the driven member to be locked to, and unlocked from, said shaft.

20, In a variable speed transmission, in combination, a revoluble driven memberhav- :ing two ends, each end having a cam runway having parallel correspondin 1'? side walls in its inner face; a revoluble rive shaft; a

spider having a plurality of legs fixedly attached to said shaft; two links pivotally attached to the end portion of each said le a roller-carrying member pivotally attac ed to the free end of each said link; a plurality of rollers pivotally attached to each said roller carrying member, one series of said rollers being positioned within said runway and capable of abutment u on the sides thereof and the other series 0 said rollers being positioned within the othersaid runway an capable of abutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven member, an annular locking member fixedly attached to saidshaft; a centrifugally movable member carried by said driven member, and means whereby the rotary movement of said driven member will cause said centrifu ally movable member to engage with, an' disenga e from, said annular member causin t e driven member to be locked to, and un ocked from, said shaft. i

- 21. In a vari ble speed transmission, in combination, a revoluble driven member having two ends, each end havin a cam runwa in its inner face; a revolu 1e drive sha capable of abutment upon the sides thereof,

so positioned that the revolution of said drive shaft will revolve said driven member, an annular locking member fixedly attached to said shaft; a centrifugally movable member car ried by said driven member; and means whereby the rotary movement of said driven member will cause said centrifally movable member to engage with, an from, said annular member causing the driven member to be locked to, and unlocked from said shaft. I

22. In a variable speed :1

: on, in

disengage combination, .a revoluble driven member having a cam runway, a revoluble drive shaft, a spider having a plurality of legs fixedly attached to said shaft, a link pivotally attached to the end portion of each said leg, a roller. carrying member pivotally attached to the free end of each said link, a plurality of rollers pivotally attached to each said'rollercarrying member positioned within said runway and capableof abutment upon the sides thereof whereby the revolution of said shaft will revolve said driven member, an annular member having a recess within its peripheryfixedly attached to said shaft, and a shoe carried by said driven member, the rotary movement of-said driven member causing said shoe to engage with, and disengage from, the walls of said recess, causing the driven member to be locked to, and unlocked from, said shaft.

23. In a variable speed transmission, in combination, a revoluble driven member having a cam runway, having parallel corresponding side walls, a revoluble drive shaft, a spider having a pluralit of legs fixedly attached to said shaft, a link pivotally attached to the end portion of each said leg, a

roller-carrying member pivotally attached to the free end of each said link, a plurality of rollers pivotally attached to each said roller-carrying member positioned within said runway and capable of abutment upon the sides thereof whereby the revolution of said shaft will revolve said driven member,

, an annular member having a recess within its periphery fixedly attached to said shaft, and a shoe carried by said driven member, the rotary movement of said driven member causing said shoe to-engage with, and disen- 1 tioned within the other said runwa' pable of abutment upon the sides t ereof, so positioned that the revolution of saidfdrive gage from, the walls of said recess, causing the driven member to be locked to, and un-' locked from said shaft. I

24. In a variable s eed transmission, in combination, a revolub e driven member having two ends, each end having a cam runway in its inner faeega revoluble drive shaft; a spider having a plurality of legs fixedly attached to'said'shaft'; two links ipivotally attached to the end portion of each said leg; a roller-carrying member pivotally attached to the free end of each said link; a pluralit of rollers pivotally attached to each said rol er carrying member, one series of said rollers being positioned within said runway and ca-" pable of abutment '.upon the sides thereof and the other series of said rollers being osian cashaft will revolve said driven member, an annular member having a recess within'its periphery fixedlw attached tojsaid shaft, and a shoe carried it said yen-"member, the rotary movement of id driven member causing said shoe to engagejwi-th ,'and-disenga 'e from, the walls of said causing t e driven member to be locked to, and unlocked from, said shaft.

25. In a variable speed transmission, in combination, a revoluble driven member having two ends, each end having a cam runway having parallel corresponding side walls in its inner face; a revoluble drive shaft; a

pable of abutment upon the sides thereof and the other series of said rollers being positioned within the other said runway and capable of abutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven-member, an annular member having a recess within its periphery fixedly attached to said shaft, and

a shoe carried by said driven member, the

rotary movement of said driven member causmg said shoe to engage with, and dlsengage from, the walls of said recess, causing the driven member to be locked to, and unlocked'from said shaft.

26. In a variable speed transmission, in combination, a revoluble driven member having two ends, each end having a cam runway in its inner face; a revoluble drive shaft positioned between said driven member ends; a spider having a plurality of legs positioned between said driven member ends and fixedly attached to said shaft; two links pivotally attached to the end portion of each said leg; a roller-carrying member pivotally attached to the free end of each said link; a plurality of rollers pivotally attached to each said roller carrying member, one series of said rollers being positioned within said runway and capable of abutment u on the sides thereof and the other series 0 said rollers being positioned within the other said runway and capable of abutment upon the sides thereof, so positioned that the revolution of said drive shaft will revolve said driven member, an

annular member having a recess within its periphery fixedly attached to said shaft, and

driven member to be locked-to, and unlocked from said shaft.

' Sighed at New York city in the county of New York and State of New York this 18thv Z P IE da 0f Jill 1929. 

